Communications: radio wave antennas – Antennas – Slot type
Patent
1984-03-29
1986-05-20
Lieberman, Eli
Communications: radio wave antennas
Antennas
Slot type
343890, 333122, 333126, H01Q 1312
Patent
active
045904790
ABSTRACT:
A high-power broadcast television arrangement includes high-power aural and visual carrier sources with rectangular waveguide outputs. A circular waveguide connects the antenna at the top of a tower with the bottom of the tower. In order to avoid an expensive, lossy and complex diplexer for combining the visual and aural carrier signals into a single waveguide, a waveguide turnstile junction couples the visual and aural signals from their respective rectangular waveguides into right- and left-hand circular polarization propagation modes in the circular waveguide. A hollow cylindrical slotted-waveguide antenna at the top of the tower receives the dual-polarized aural and visual signals received from the circular waveguide and radiates a television signal with the aid of resonant radiating slots and polarization-insensitive couplers.
REFERENCES:
patent: 2686901 (1954-08-01), Dicke
patent: 2807018 (1957-09-01), Woodward
patent: 2947988 (1960-08-01), Masters
patent: 2981947 (1961-04-01), Bazan
patent: 3019438 (1962-01-01), Pan
patent: 4074265 (1978-02-01), True
patent: 4240155 (1980-12-01), Vaughan
Lieberman Eli
Meise William H.
RCA Corporation
Tripoli Joseph S.
Troike Robert L.
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